Hi,

 

I have an Item (a projectile launcher) that looks perfect when rendered in in the Player's hand but points the wrong way when rendered in the Player's inventory. Is there a way to rotate a texture, but only in the inventory?

 

Thanks!

Hi

 

yes there is, you can use an IItemRenderer, see the item rendering sections here

http://greyminecraftcoder.blogspot.com.au/p/list-of-topics.html

 

In your renderer, use GL11.glRotatef(180, 0, 1, 0); to rotate by 180 degrees around the vertical axis.

 

http://www.glprogramming.com/red/chapter03.html

 

-TGG

 

 

Where would I put glRotatef? Also, is there a way to use vanilla rendering in the IItemRenderer instead of using the Tessellator?

Never mind I got it to work by messing with vertices.

I have a problem now. It renders correctly in the inventory, but often has a weird colored background. Any ideas how to fix this?

 

Here is my Item Renderer code:

public class ItemRendererCannon implements IItemRenderer{

public static RenderItem renderitem = new RenderItem();

@Override
public boolean handleRenderType(ItemStack item, ItemRenderType type) {
	switch (type) {
	case EQUIPPED:
		return false;
	case EQUIPPED_FIRST_PERSON:
		return false;
	case ENTITY:
		return false;
	case INVENTORY:
		return true;
	default:
		return false;
	}
}

@Override
public boolean shouldUseRenderHelper(ItemRenderType type, ItemStack item,
		ItemRendererHelper helper) {
	return false;
}

@Override
public void renderItem(ItemRenderType type, ItemStack item, Object... data) {
	switch(type){
	case EQUIPPED:
		break;
	case EQUIPPED_FIRST_PERSON:
		break;
	case ENTITY:
		break;
	case INVENTORY:
		Draw2D(item);
		break;
	default:
		break;
	}

}

public void Draw2D(ItemStack item){
    IIcon icon = item.getItem().getIcon(item, 0);

	Tessellator tessellator = Tessellator.instance;		
    tessellator.startDrawingQuads();
    
    double minU1 = (double)icon.getMinU();
    double minV1 = (double)icon.getMinV();
    double maxU1 = (double)icon.getMaxU();
    double maxV1 = (double)icon.getMaxV();

    tessellator.addVertexWithUV(16.0, 16.0, 0.0, minU1, maxV1);
    tessellator.addVertexWithUV(16.0,  0.0, 0.0, maxU1, maxV1);
    tessellator.addVertexWithUV( 0.0,  0.0, 0.0, maxU1, minV1);
    tessellator.addVertexWithUV( 0.0, 16.0, 0.0, minU1, minV1);
    	    
    tessellator.draw();
}

}

 

There is a screenshot at https://cloud.githubusercontent.com/assets/6693944/4097725/b5ba9626-2fe0-11e4-91e3-952fcab11ca9.png

Note the colored background of the items in the hotbar. Any idea how to fix this? It it caused by messing with the image vertices?